A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in$^2$
Autor: | Antony Ajan, Barry C. Stipe, Oleksandr Mosendz, Ganping Ju, Eric J. Champion, Xiaobin Wang, Gregory Parker, Dieter Weller, Timothy J. Klemmer |
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Rok vydání: | 2014 |
Předmět: | |
Zdroj: | IEEE Transactions on Magnetics. 50:1-8 |
ISSN: | 1941-0069 0018-9464 |
Popis: | This paper discusses heat-assisted magnetic recording (HAMR) media requirements and challenges for areal densities (AD) beyond 1 Tb/in2. Based on recent roadmap discussions the focus is primarily on granular chemically ordered L10 FePtX-Y-perpendicular media with reduced average grain size down to 〈D〉 = 3-5 nm relative to current CoCrPt based perpendicular magnetic recording (PMR) media with average grain size 〈D〉 = 7-9 nm. In HAMR media the combination of thermal conductivity and Curie temperature TC determines the required laser power during recording. Key challenges are sigma variations of D and TC which need to be reduced to σD/D ~ 10-15% and σTC/TC ~ 2%. In addition AD is limited by switching field distribution (SFD) and thermal spot size. The key goal going forward is to optimize heads, media, head-media-spacing (HMS) and read-back channel technologies to extend AD to 4 Tb/in2 and beyond. |
Databáze: | OpenAIRE |
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